<!DOCTYPE html>
<html>
	<head>
		<meta charset="utf-8">
		<title></title>
	</head>
	<body>
		<input type="text" name="" id="numInput" value="" />
		<button onclick="foo()">执行</button>
		<script>
			function foo()
			{
				var num=numInput.value;
				for(var i=0;i<num;i++)
				{
					console.log(i)
				}
			}
			
			
		</script>
	</body>
</html>
